public class Main {
    public static void main(String[] args) {
        System.out.println("我是module1");
        outUsers();
    }

    public static void outUsers(){
        User1 user1 = new User1("模块1");
        User2 user2 = new User2("模块2","20");
        User3 user3 = new User3("模块2","20","北京");

        System.out.println(user1);
        System.out.println(user2);
        System.out.println(user3);
    }
}
